They are for Charlie and Sophie - their two miracle babies they lost at 15 and 16 weeks.

The trauma of Mrs Schlage's first miscarriage was compounded by a system ill-prepared to support women through the loss of a child in early pregnancy.

But her work since then will change the way other women experience miscarriage in the ACT.

After years of research and lobbying by Mrs Schlage, Health Minister Rachel Stephen-Smith on Friday announced a new dedicated early pregnancy unit would be built at the Centenary Hospital for Women and Children.

It is being added under a change of scope to the $50 million expansion already under way at the hospital.

The unit will have three beds and support all complications relating to early pregnancy, including miscarriage.

It will be next to the antenatal ward, and will be designed to offer a therapeutic and healing environment, staffed by a multidisciplinary team.

"This new unit will provide women and families with the support and care required during an incredibly difficult and emotional time," Ms Stephen-Smith said.

Mrs Schlage's son Charlie was delivered in a surgical ward after labouring in an emergency department.

She was distressed when clinicians referred to her baby as "the products of conception", and assumed she would not want to deliver him.

Last year, Mrs Schlage and her husband sadly also lost a daughter, Sophia, at Centenary Hospital at just under 17 weeks.

"What we went through when we lost Charlie showed us what needed to change in the system, but our experience losing Sophia showed us what was possible and the sort of care and emotional support that I hope that all women losing a baby will be able to experience," she said.

"I'm really sorry that women and families will need to use this new early pregnancy unit, but at the same time I am so grateful that they will be able to.

"For so many women and families, from the moment we know we are pregnant, we're carrying a baby.

"We don't think of those babies as zygotes, or embryos or fetuses, or products of conception.

"When we lost our babies, we did not just lose their 15 or 16 weeks of being, we lost everything that had been stretching before us.

"We lost our very loved son and daughter and there are gaps in our dining table and in our hearts, and they will be there forever. We lost babies who mattered.

"The ACT government is saying all of these babies matter."

The unit is not expected to be open until 2022, but the hospital's executive director, Tina Bracher, said work was happening to improve processes in the meantime.

"We are working very rapidly with our general ward areas in the Canberra Hospital to see whether we can have a smaller, dedicated space in the general ward areas for women who may need to have an inpatient stay," she said.